Vietnam, Nghe An Prov., Tuong Duong Distr., Tam Hop Municipality, Pa Lom village, around point 19°05′07″N 104°20′55″E at elevation 1300-1350 m a.s.l.
Submontane primary evergreen closed forest on very steep mountain slopes composed with stratified solid shale.
Terrestrial herb up to 3 m tall on very steep rocky shady mountain slope along forest stream. Flowers white, central tepal light yellow with purple-red nerves. Not common.
HLF 7068 25 March 2007. Photo.
Coll. Averyanov L., P.K.Loc, N.V.Trai, N.T.Vinh, N.D.Phuong, Averyanova A. Grant from Henry Luce Foundation.